Door-lock.



No. 638,404. Patented neu. 5, m99.v

D. E. SMITH.

'000B LUCK.

(Application led Dec. 80, 189B.)

(No Model.)

Pres

CHARLES EDMOND SMITH, OF OROVILLE, CALIFORNIA,

DOOR-LOCK.

SPECIFIGATICN forming part of Letters Patent No. 638,404, dated December 5, 1899.

Application filed December 30.1898. Serial No. 700,6 94. (No model.)

To all whom t may concern.:

Beit known that LGHARLES EDMOND SMITH, a citizen of the United States, residing at Oroville,county of Butte,State of California, have invented an Improvement in Door-Locks; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to a lock for doors.

It consists in the parts and the constructions and combinations of parts hereinafter described and claimed.

Y Iiigure 1 is an interior view of the lock, one side of the case removed and the latch and lock bolts extended. Fig. 2 is a face view of the socket-plate. Fig. 3 is a lateral section through the lock on line ma: of Fig. l. Fig. 4 shows the position of the parts connected with the bolt when the latter is withdrawn.

A is the casing of the lock, which may be of any suitable or desired form adapted to contain the mechanism and may be fitted as a mortise-lock, as will be hereinafter described, or it may be adapted to be applied to one side of the door. This casing contains the springlatch, Which holds the door closed under ordinary conditions and which is operated by knobs upon either side in the usual manner to retract the latch and allow the door to be opened. It also contains the locking-bolt, which is operated by a key. ot is a cylindrical socket having a rectangular opening on', adapted to receive the knob-shank, the latter carrying the knobs upon the outside,by which the shank and the sleeve ci are turnable. From one side of the socket or sleeve projects an arm a2. This arm is connected by a detachable link o with the inner end of the latchbolt Z), and this bolt has upon the outer end the latch o', which is adapt-ed to engage the keeper fixed in the jamb of the door.

e e are two lugs cast or otherwise formed upon the casing and grooved or channeled, so that when the two parts of the lock are put together they form a complete opening, in which the bolt b is slidable. Surrounding the bolt b is a spiral spring h2, and one end of it abuts against the iixed lugs e and the other presses against the shoulder Vof the latch b', so as to normally force the latch outward to engage with its proper keeper when the door is closed. The link chas a transverse open slot c4 at one end, adapted to drop over a pin on the rear end of the bolt, and thus make an easily-detachable connection, and it also has a longitudinal slot made in the opposite end, as shown at c', and the pin o2, which connects the arm a2 with the link c, passes 'through the slot c and is normally in contact with the inner end of the slot, being retained there by the action of the spring b2; but whenever the beveled edge of the latch b strikes the plate, so that the latch is forced inward to allow the door to close, this slot allows the part c to slide correspondingly upon the pin c2 without effect upon the other parts. When the latch is to be withdrawn, it is done by turning either of the knobs in either direction, thus turning the arm a2 and the connecting-link c into the position shown in dotted lines, either above or below, according to the manner in which the knob is turned, and this retracts the latch h and allows the door to be opened. Whenever the knob is released, the spring b2 returns the parts into their normal position.

The lock-bolt g is slidable through the proper opening in the edge of the lock-case and is guided in its movements by a lug d, cast or fixed within the look-case. The lockbolt has a triangular-shaped opening made through the lower part in line with the position of the keyhole, as shown at g', and when the key is introduced and turned, if the bolt is extended, the key will strike against the rear end of this opening and retract the bolt. If the bolt is retracted and it is to be extended to lock the door, the turning of the key Z will f cause it to strike against the front of said opening, and thus move the bolt outward. The rear end of the bolt is made thinner than the body, and this thin portion also extends forwardly from the triangular opening G', as shown at g2. The thin portion or web of the bolt is central in a vertical plane, leaving spaces or channels upon each side, and within these channels fit the plates h, which have extensions h fitting upon each side of the thin portion g2 of the bolt. These extensions 7L' have lugs h2, and the thicker portions of the bolt G, at each side of the web g2, have notches t', into which the lugs h2 of the plates h may drop. Thus when the bolt is retracted the lug h2 may drop into the front notch t', and when the bolt is forced out to lock the IOO door it may drop into the rear notch e. These two plates lie upon opposite sides of the Athin web at the rear portion of the bolt and may be approximately flush with the thicker front end of the bolt. Vhen the door is unlocked, the lugs h2 of both of these plates will be engaged by the forward notch t', the outer end of the bolt being flush with the edge of the lock.

When the key is inserted from either side to lock the door, the turn of the key causes it to first engagethe lower side of the extension h of the plate 7L, which is on that side of r the lock-bolt upon which the keyis inserted,

thus releasing the lug` h2 from the notch I in the bolt. The continued turning of the key will advance the lock-bolt to lock the door, and the lug h2 will drop into the rear notch t" and prevent the withdrawing of the bolt. The plate h upon the opposite side not being disengaged from the notch t' will be carried along with the bolt, so that its rear and deeper portion will be advanced and cover the keyhole.` This prevents any introduction of a key from the opposite side or any tampering with the lock.

The knob-shank, as previously described, passes through the rectangular openin g d', and in order to iit it and the knobs to any door to which the lock may be applied I have sh own the knobs 7i; k fixed to separate parts, which when united form the k hob-shank. These parts consist of the parallel elastic plates m, projecting inwardly from one of the knobs and at a certain distance apart from each other, and the single plate it projecting from the other knob 7o. These plates m m' are preferably made of spring-steel, one of them having a smooth inner surface and the other having ratchet teeth or notches o, formed on its inner face. The plate n has its back made smooth, corresponding with the inner face of one of the plates m, and its opposite face has teeth corresponding with those shown at 0. When the knobs are to be connected, one of the knobs K may be placed with the plates m passing through the rectangular slot a, and the other plate n is introduced between the plates m by pressing the two knobs toward each other until they come into contact with the escutcheons upon each side of the door. The plates fm, by reason of their elasticity and a sufficient size of the opening d', will be separated by the introduction of the toothed plate n, and the teeth o will engage with and slip over each other, moving inwardly until the knobs are in contact with the escutcheons, when the teeth o, engaging, will prevent the knobs from being withdrawn.

In order to fit a mortise-lock without the time and labor ordinarily necessary, I have shown the lock-case made with a face-plate similar to the socket-plate C (shown in Fig. 2) in that it will have a series of convexities so placed with relation to each other that each one will fit the hole bored out by a carpenters bit of the proper diameter. The upper and lower circular ends B, as shown in Fig. 1, represent that portion of the faceplate which is exterior to the lock-casing itself, and through these are made holes to receive the screws by which the lock is secured. The plate C, which contains the sockets for the latch and bolt and is located in the doorjamb, is made in the same manner as shown in Fig.l 2, but has the additional strike-plate I) cast with it.

The lock made in this manner is very simple, having but few parts and those easily disengaged or interchangeable and little liable to be disarranged or broken by hard usage.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a lock, the casing, a latch-bolt guided and slidable through the edge plate of the lock, lugs through or between which the inner end of the bolt is slidable and guided, a spring surrounding the inner portion and compressed between the lugs and the outer portion of the bolt of the latch whereby the latter is normally forced outward, a turnable socket-piece through which the knob-shank passes, said socket-piece having an extension or arm at one side and a latching-link detachably connecting said extension with the inner end of the latch-bolt.

2. In a door-lock, a latch-bolt guided and slidable through the edge plate of the lock, lugs by which the inner end thereof is guided and a spring compressed between the lugs and the front end of the latch, a socket-piece through which the knob-shank passes and tu rnable thereby, said socket having an arm projecting normally in line with the line of movement of the latch-bolt, a connectinglink having a longitudinal slot in one end, into which slot the pin from the arm projects, a transverse slot or channel at the opposite end adapted to detachably engage with the pin upon the inner end of the latch-bolt whereby the latter may be retracted by turning the knob and free to move when the door is closed or without turning the knob.

3. In a door-lock, comprising independent latching and locking bolts, a latch-bolt movable by means of knobs, and a locking-bolt movable by means of an insertible key, said bolt having its rear end cut away to form a thin vertical web, notches made upon the thicker portion of the bolt at each side of said web, and one in advance of the other, and independent plates lying upon each side of the web and having lugs adapted to engage the aforesaid notches to hold the bolt locked in either a projected or retracted position, substantially as described. v

4t. In a door-lock, a bolt having a triangular or ,fi-shaped notch formed in the rearportion and in the line transversely of the keyhole, a central web made in the rear part of the bolt and thinner than the main portion thereof, said web extending also horizontally along and below the top of the bolt whereby IOO IIO

eeefioe= horizontal and vertical shoulders are formed between the thicker and thinner parts of the bolt, plates iitting upon each side of said Web with extensions along the thin upper portion, said extensions having projecting lugs, notches disposed one in advance of the other and formed in the horizontal shoulders of the bolt from each side of the web which are enhoriiontally-slidable locking-bolt, means for engaging said bolt by a turnable key whereby it is reciprocatcd Within the casing, supplemental plates lying parallel with the bolt upon opposite sides thereof, and adapted to cover or uncover the keyhole from their respective sides, and means including notches in the bolt and lugs on the plates to engage said notches, for engaging said plates with the locking-bolt and disengaging one of them from the bolt when the key is introduced and turned.

In Witness whereof I have hereunto set my hand.

CHARLES EDMOND SMITH. [L. s] Witnesses:

J. R. GRANT, I WILLIAM H. SCOTT. 

